WO2022177117A1 - Alimentation électrique, dispositif électronique et son procédé de commande - Google Patents

Alimentation électrique, dispositif électronique et son procédé de commande Download PDF

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Publication number
WO2022177117A1
WO2022177117A1 PCT/KR2021/019183 KR2021019183W WO2022177117A1 WO 2022177117 A1 WO2022177117 A1 WO 2022177117A1 KR 2021019183 W KR2021019183 W KR 2021019183W WO 2022177117 A1 WO2022177117 A1 WO 2022177117A1
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WIPO (PCT)
Prior art keywords
temperature
switching elements
power supply
voltage
cooling device
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PCT/KR2021/019183
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English (en)
Korean (ko)
Inventor
신종현
박영재
이정훈
이태호
Original Assignee
삼성전자주식회사
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Application filed by 삼성전자주식회사 filed Critical 삼성전자주식회사
Publication of WO2022177117A1 publication Critical patent/WO2022177117A1/fr
Priority to US18/196,596 priority Critical patent/US20230283191A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20945—Thermal management, e.g. inverter temperature control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20936—Liquid coolant with phase change
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements

Definitions

  • the present invention relates to a power supply device for supplying power and an electronic device including the same.
  • a power supply may include a plurality of switching elements.
  • the plurality of switching elements may be located in the converter to convert the AC voltage to a DC voltage, and may be located in the inverter to convert the DC voltage to a three-phase voltage.
  • the operation of the plurality of switching elements may generate heat in the power supply device, and a heat sink such as a heat sink may be used to cool the power supply device.
  • a heat sink such as a heat sink
  • the plurality of switching elements may be provided in a structure coupled to the heat sink.
  • a power supply device and an electronic device capable of protecting a switching device by detecting a temperature error state based on a temperature change amount of a switching device or a temperature difference between a plurality of switching devices and performing temperature protection control.
  • a power supply device includes a rectifier for rectifying an input AC voltage; a converter including at least one first switching element and converting the rectified input AC voltage into a DC voltage; an inverter including a plurality of second switching elements and converting the DC voltage into an AC voltage; a plurality of temperature sensors for sensing the temperature of each of a plurality of switching elements including the at least one first switching element and the plurality of second switching elements; and determining whether a temperature error in the plurality of switching elements is based on a temperature difference between the plurality of switching elements or a temperature change amount of each of the plurality of switching elements, and when determining as the temperature error, for the plurality of switching elements It includes a processor that performs temperature protection control.
  • the processor may determine the temperature error when the amount of temperature change in any one of the plurality of switching elements is maintained for a preset time equal to or greater than a preset value.
  • the processor may determine the temperature error when a temperature difference between any one of the plurality of switching elements and the other one of the plurality of switching elements exceeds a preset temperature difference for a preset time.
  • the processor may adjust the preset temperature difference in an increasing direction when the input AC voltage increases.
  • the processor when the amount of change in the temperature difference between any one of the plurality of switching elements and the other one of the plurality of switching elements exceeds a preset value and is maintained for a preset time, the temperature can be determined by error.
  • the processor may perform the temperature protection control by lowering a supply current to the plurality of switching elements when it is determined as the temperature error.
  • the power supply device may further include a cooling device for lowering the temperature of the plurality of switching elements, and the processor may perform the temperature protection control by increasing the cooling performance of the cooling device when it is determined as the temperature error. have.
  • the cooling device may be a cooling device of a refrigerant cooling method, and the processor may increase a refrigerant flow rate of the cooling device to increase cooling performance of the cooling device.
  • the cooling device may be an air cooling device, and the processor may increase an air volume of the cooling device to increase cooling performance of the cooling device.
  • the power supply device may further include a current sensor configured to sense an input current of the input AC voltage, wherein the processor determines whether a temperature error in the plurality of switching elements is present when the amount of change in the input current is less than a preset value. can decide whether a temperature error in the plurality of switching elements is present when the amount of change in the input current is less than a preset value.
  • a power supply device including a rectifier, a converter including at least one first switching element, and an inverter including a plurality of second switching elements
  • the input AC voltage rectified by the rectifier is converted into a DC voltage.
  • control the converter to convert; controlling the inverter to convert the DC voltage into an AC voltage; sensing a temperature of each of a plurality of switching elements including the at least one first switching element and the plurality of second switching elements; determining whether there is a temperature error in the plurality of switching elements based on a temperature difference between the plurality of switching elements or a temperature change amount of each of the plurality of switching elements; and performing temperature protection control for the plurality of switching elements when it is determined as the temperature error.
  • Determining whether the temperature error occurs may include determining as the temperature error when the amount of temperature change in any one of the plurality of switching elements is maintained for a preset time equal to or greater than a preset value.
  • the temperature error Determining whether the temperature error is, when the temperature difference between any one of the plurality of switching elements and the other one of the plurality of switching elements exceeds a preset temperature difference for a preset time, the temperature error It may include;
  • the control method of the power supply device may further include adjusting the preset temperature difference in an increasing direction when the input AC voltage increases.
  • the performing of the temperature protection control may include lowering a supply current to the plurality of switching elements to perform the temperature protection control when it is determined as the temperature error.
  • the power supply device further includes a cooling device for lowering the temperature of the plurality of switching elements, and performing the temperature protection control increases the cooling performance of the cooling device when it is determined as the temperature error to protect the temperature performing control; may include.
  • the cooling device is a cooling device of a refrigerant cooling method, and performing the temperature protection control may include increasing a refrigerant flow rate of the cooling device to increase cooling performance of the cooling device.
  • the power supply device may further include a current sensor configured to sense an input current of the input AC voltage, and determining whether the temperature error occurs when the amount of change in the input current is less than a preset value in the plurality of switching elements. Determining whether the temperature error of the; may include.
  • an electronic device includes: a load receiving power to perform an operation; and a power supply device for supplying power to the load, the power supply device according to any one of claims 1 to 10.
  • a temperature error state is detected based on a temperature change amount of a switching element or a temperature difference between a plurality of switching elements, and a temperature protection control is performed to protect the switching element and system error can be prevented.
  • FIG. 1 is a block diagram of a power supply device according to an embodiment.
  • FIG. 2 is a circuit diagram of a power supply device according to an embodiment.
  • FIG 3 illustrates a temperature change of a switching element according to whether or not a temperature error occurs in the power supply device according to an exemplary embodiment.
  • FIG. 4 illustrates an amount of change in temperature of a switching element in a steady state in a power supply device according to an exemplary embodiment.
  • FIG. 5 illustrates a temperature change amount of a switching element in a temperature error state in a power supply device according to an exemplary embodiment.
  • FIG. 6 is a diagram for explaining a case in which a temperature error is determined based on a temperature difference between switching elements in a power supply device according to an exemplary embodiment.
  • FIG. 7 is a diagram illustrating a case in which the power supply device according to an exemplary embodiment terminates power supply to a load according to a temperature error.
  • FIG. 8 is a control block diagram of an electronic device according to an exemplary embodiment.
  • FIG. 9 is a flowchart illustrating a case in which temperature protection control is performed based on an amount of change in temperature of a switching element in a method of controlling a power supply device according to an exemplary embodiment.
  • FIG. 10 is a flowchart illustrating a case in which temperature protection control is performed based on a temperature difference between switching elements in a method of controlling a power supply device according to an exemplary embodiment.
  • a part when a part is "connected" to another part, it includes not only a case in which it is directly connected, but also a case in which it is indirectly connected, and the indirect connection refers to being connected through a wireless communication network.
  • first may be referred to as a second component
  • second component may also be referred to as a first component
  • ⁇ part may mean a unit for processing at least one function or operation.
  • the terms may mean at least one process processed by at least one hardware such as a field-programmable gate array (FPGA) / application specific integrated circuit (ASIC), at least one software stored in a memory, or a processor. have.
  • FPGA field-programmable gate array
  • ASIC application specific integrated circuit
  • FIG. 1 is a block diagram of a power supply device according to an embodiment
  • FIG. 2 is a circuit diagram of a power supply device according to an embodiment.
  • a power supply device 10 includes a power input terminal 110 connected to an external power source, a rectifier 120 for rectifying an input AC voltage supplied from an external power source, and a rectifier.
  • a converter 130 that converts the converted AC voltage into a DC voltage that follows a preset voltage, a DC link unit 140 receiving a DC voltage output from the converter 130, and a DC link unit 140 receiving and an inverter 150 for converting a DC voltage into a three-phase voltage.
  • the power supply device 10 includes a controller 160 that controls at least one first switching element 135 included in the converter 130 and a plurality of second switching elements 155 included in the inverter 150 . ), a temperature sensor 170 sensing the temperature of each of the first switching element 135 and the second switching element 155, a current sensor 180 sensing an input current of an input AC voltage, and temperature protection control It includes a cooling device 190 to perform.
  • the power input terminal 110 may receive an input AC voltage input from an external power source.
  • the external power source may be provided as a single-phase voltage source or a three-phase voltage source, and the type is not limited.
  • the rectifier 120 may rectify an input AC voltage.
  • the rectifier 120 may receive AC power from the power input terminal 110 , and may rectify the supplied AC power.
  • the rectifier 120 may be connected to the power input terminal 110 to rectify the AC voltage input through the power input terminal 110 .
  • the rectifier 120 may be provided as a diode bridge, and may include a switching element replacing the diode according to an embodiment.
  • the rectifier 120 may include four diodes in the form of a full bridge.
  • the rectifier 120 may correspond to a synchronous rectifier that includes four switching elements in the form of a full bridge and rectifies an AC voltage through synchronization between the switching elements.
  • the type of the rectifier 120 is not limited to the above example, and any type capable of rectifying an input AC voltage may be employed without limitation.
  • the converter 130 may be connected to the rectifier 120 to receive a rectified input AC voltage, and may convert the rectified input AC voltage into a DC voltage following a preset voltage.
  • the converter 130 may include at least one first switching element 135 , and by turning on or off the at least one switching element according to the control of the controller 160 , the rectified AC voltage is converted to a preset voltage. It can be converted into a direct voltage that follows.
  • the converter 130 may boost the magnitude of the rectified input AC voltage to a preset voltage according to the operation of the at least one first switching element 135 , and synchronize the phases of the voltage and the current, thereby reducing the power factor.
  • the converter 130 may correspond to a power factor correction (PFC) boost converter, and the DC voltage may exceed the peak value of the rectified AC voltage.
  • PFC power factor correction
  • the converter 130 includes an inductor 131 provided on a line connected to the rectifier 120 , and a first switching provided between a node on the inductor 131 side and a node on the ground side. element 135 may be included.
  • the circuit configuration of the converter 130 is not limited thereto, and there is no limitation as long as it is a circuit configuration of a known converter for power factor improvement and boosting.
  • the DC link unit 140 may be connected to the converter 130 to receive a DC voltage following a preset voltage. Through this, the DC link unit 140 may supply a DC voltage to the connected inverter 150 .
  • the DC link unit 140 may be provided as a capacitor 145 , and the capacitor 145 may be charged with a DC voltage supplied from the converter 130 to store the DC voltage. .
  • the inverter 150 may include a plurality of second switching elements 155 , and may convert a DC voltage received from the DC link unit 140 into a three-phase voltage.
  • the inverter 150 is, as shown in FIG. 2 , two second switching elements 155 connected in series with each other for the U phase, and two second switching elements 155 connected in series with each other for the V phase. ), may include two second switching elements 155 connected in series with each other for the W phase.
  • the three-phase voltage output from the inverter 150 may be supplied to a load (eg, a compressor or a motor) connected through an output terminal.
  • a load eg, a compressor or a motor
  • the plurality of switching elements 135 and 155 including both the first switching element 135 and the second switching element 155 are a bipolar junction transistor (BJT), a metal oxide semiconductor field effect transistor. It may include a metal-oxide-semiconductor field effect transistor (MOSFET), an insulated gate bipolar transistor (IGBT), a thyristor, and the like.
  • BJT bipolar junction transistor
  • MOSFET metal-oxide-semiconductor field effect transistor
  • IGBT insulated gate bipolar transistor
  • thyristor a thyristor
  • the type of the switching element is not limited to the above example, and any element that performs a switching operation may be included without limitation.
  • the control unit 160 may control on/off of each of the first switching element 135 and the second switching element 155 according to a required voltage from the load.
  • control unit 160 may include a plurality of switching elements 135 and 155 based on a temperature change amount of each of the plurality of switching elements 135 and 155 or a temperature difference between the plurality of switching elements 135 and 155 . ) can be determined whether there is a temperature error, and when it is determined as a temperature error, temperature protection control for a plurality of switching elements can be performed. Determining a temperature error state in the plurality of switching elements 135 and 155 and performing temperature protection control will be described in detail later.
  • the controller 160 may include at least one memory for storing a program for performing the above-described operation and an operation to be described later, and at least one processor for executing the stored program.
  • a plurality of temperature sensors 170 may be provided to sense the temperature of each of the plurality of switching elements 135 and 155 , and to be provided corresponding to each of the plurality of switching elements 135 and 155 , respectively.
  • the controller 160 may determine the temperature of each of the plurality of switching elements 135 and 155 based on the outputs transmitted from the plurality of temperature sensors 170 .
  • the current sensor 180 may sense an input current of an input AC voltage, and according to an embodiment, may sense an input AC voltage based on the input current.
  • the current sensor 180 may sense a current in the connection line between the power input terminal 110 and the rectifier 120 as shown in FIG. 2 .
  • the position of the current sensor 180 is not limited to the above example, and according to the embodiment, a current in the connection line between the rectifier 120 and the converter 130 is sensed, or the converter 130 and the DC link A current in the connection line between the units 140 may be sensed.
  • the current sensor 180 may transmit the sensed current value of the input current to the controller 160 , and the controller 160 , the amount of change in the input current based on the current value of the input current transferred from the current sensor 180 . can be judged
  • the cooling device 190 may cool the power supply device 10 and may perform a temperature protection operation under the control of the controller 160 .
  • the cooling device 190 may increase cooling performance according to the temperature protection control of the controller 160 .
  • the cooling device 190 may be provided as a cooling device of a refrigerant cooling method according to an embodiment, and a refrigerant flow rate may be increased to increase cooling performance according to the temperature protection control of the controller 160 .
  • cooling device 190 may be provided as an air cooling type cooling device according to an embodiment, and the air volume may be increased to increase cooling performance according to the temperature protection control of the controller 160 .
  • the power supply 10 performs temperature protection control based on the amount of change in temperature of the plurality of switching elements 135 and 155 or the temperature difference between the plurality of switching elements 135 and 155 .
  • FIG 3 illustrates temperature changes of the switching elements 135 and 155 according to whether or not a temperature error occurs in the power supply 10 according to an exemplary embodiment.
  • Each of the at least one first switching element 135 included in the converter 130 and the plurality of second switching elements 155 included in the inverter 150 is coupled to a heat sink such as a heat sink. can be provided with
  • all of the plurality of switching elements 135 and 155 included in the power supply device 10 may be provided to be coupled to the heat sink.
  • the temperature of the switching elements 135 and 155 does not rise above a predetermined value, whereas the switching In the temperature error state in which the coupling between the elements 135 and 155 and the heat sink is incomplete, the temperature of the switching elements 135 and 155 may be higher than that in the normal state.
  • the controller 160 may detect a temperature change amount of the switching elements 135 and 155 to determine whether a temperature error state is present, and perform temperature protection control.
  • FIG. 4 shows the amount of change in temperature of the switching elements 135 and 155 in a normal state in the power supply device 10 according to an embodiment
  • FIG. 5 is a temperature error state in the power supply device 10 according to an embodiment. The amount of change in temperature of the switching elements 135 and 155 is shown.
  • the temperature of the switching elements 135 and 155 may increase according to a switching operation.
  • the temperature change amount may mean a temperature change amount for a unit time.
  • the rapid temperature rise of the switching elements 135 and 155 may be suppressed according to cooling by the heat sink, so that the temperature of the switching elements 135 and 155 may rise with a constant slope.
  • the amount of change in temperature of the switching elements 135 and 155 is preset. It may be maintained in a state higher than a value (eg, 1.5° C./s), and the control unit 160, the amount of temperature change of the switching elements 135 and 155 is greater than or equal to a preset value for a preset time (eg, 20 seconds) When maintained, it is determined as a temperature error and an error count can be added, and the switching elements 135 and 155 can be cooled by performing temperature protection control.
  • a preset value for a preset time eg, 20 seconds
  • thermal runaway may occur in the corresponding switching element and the temperature of the entire power supply device 10 . cannot represent the temperature of the corresponding switching element, so that thermal runaway in the corresponding switching element cannot be prevented by temperature protection control based on the temperature of the power supply device 10 .
  • the power supply device 10 of the present invention continuously senses the temperature change amount of each of the plurality of switching elements 135 and 155, while the temperature change amount in any one of the switching elements is preset to be greater than or equal to a preset value. Temperature protection control can be performed if maintained for a period of time.
  • the control unit 160 the amount of temperature change in any one of the plurality of switching elements 135 and 155 included in each of the converter 130 and the inverter 150 is greater than or equal to a preset value for a preset time. If maintained for a while, it can be determined as a temperature error in the corresponding switching element, and temperature protection control for cooling of the corresponding switching element can be performed.
  • the controller 160 may adjust the preset value to be compared with the temperature change of the switching element in an increasing direction in proportion to the magnitude of the input current or the input AC voltage.
  • control unit 160 when the temperature in the switching element rises rapidly and the amount of temperature change in the switching element is maintained for a preset time equal to or greater than a preset value, the corresponding switching Temperature protection control for device cooling can be performed. Through this, the temperature of the switching element may be lowered, as shown between sections A and B in FIG. 5 .
  • the controller 160 may determine whether there is a temperature error in the plurality of switching elements 135 and 155 when the amount of change of the input current is less than a preset value, according to an embodiment. That is, in the power supply device 10, the amount of change in temperature of the switching elements 135 and 155 only when the input current is constant, considering that the temperature in the switching elements 135 and 155 also varies when the input current is changed. It is possible to determine the temperature error condition based on
  • the controller 160 may perform temperature protection control by lowering supply currents to the plurality of switching elements 135 and 155 when it is determined that the temperature error state is determined according to an embodiment. For example, the controller 160 controls the plurality of switching elements 135 and 155 to decrease the switching frequency of the plurality of switching elements 135 and 155 or to increase the off time of the plurality of switching elements 135 and 155 . Switching can be controlled.
  • the controller 160 may perform temperature protection control by increasing the cooling performance of the cooling device 190 when it is determined that the temperature error state is determined according to an embodiment. For example, when the cooling device 190 is a cooling device of a refrigerant cooling method, the controller 160 may increase the refrigerant flow rate of the cooling device 190 to increase the cooling performance of the cooling device 190 . Also, when the cooling device 190 is an air cooling type cooling device, the controller 160 may increase the air volume of the cooling device 190 to increase the cooling performance of the cooling device 190 .
  • the control unit 160 may perform the temperature protection control a plurality of times according to an embodiment, and even though the temperature protection control is performed more than a preset number of times, the control unit 160 determines the temperature error state in the switching elements 135 and 155 . In this case, the power supply operation may be stopped. For example, as shown in FIG. 5 , the control unit 160 performs temperature protection control based on the determination of the temperature error state in each of the A section and the B section, and then performs the temperature protection control as in the C section. 155), the power supply operation may be stopped if the temperature error condition is determined again.
  • the power supply device 10 performs temperature protection control based on the amount of change in temperature of the switching elements 135 and 155 .
  • the power supply 10 performs temperature protection control based on the temperature difference between the switching elements 135 and 155 .
  • FIG. 6 is a diagram for explaining a case in which a temperature error is determined based on a temperature difference between the switching elements 135 and 155 in the power supply 10 according to an embodiment
  • FIG. 7 is a power supply according to an embodiment It is a diagram illustrating a case in which the device 10 terminates supply of power to a load according to a temperature error.
  • the power supply device 10 determines whether a temperature error state exists based on a temperature difference between a plurality of switching elements 135 and 155 , and controls temperature protection when the temperature error state is determined. can be performed.
  • the temperature difference between the plurality of switching elements 135 and 155 may not be large according to the cooling of the heat sink.
  • the corresponding switching element is the plurality of switching elements 135 and 155 .
  • a temperature difference with the other switching elements may increase.
  • control unit 160 is configured to perform an operation between any one of the plurality of switching elements 135 and 155 and the other one of the plurality of switching elements 135 and 155 .
  • the controller 160 may adjust a preset temperature difference to be compared with the temperature difference between the switching elements in an increasing direction in proportion to the magnitude of the input current.
  • the temperature of the second switching element 155 is the second switching element 155 of the converter 130 . 1
  • the temperature of the switching element 135 may increase steeply compared to the temperature.
  • the control unit 160 the state in which the temperature difference between the first switching element 135 and the second switching element 155 exceeds a preset temperature difference (eg, 25 °C) is a preset time (eg, 100 seconds) ), it is determined as a temperature error state, and temperature protection control can be performed.
  • a preset temperature difference eg, 25 °C
  • a preset time eg, 100 seconds
  • the controller 160 may perform temperature protection control by lowering supply currents to the plurality of switching elements 135 and 155 when it is determined that the temperature error state is determined according to an embodiment. For example, the controller 160 controls the plurality of switching elements 135 and 155 to decrease the switching frequency of the plurality of switching elements 135 and 155 or to increase the off time of the plurality of switching elements 135 and 155 . Switching can be controlled. In addition, as shown in FIG. 6 , the control unit 160 turns off the plurality of switching elements 135 and 155 so as to stop the supply current to the load (eg, a compressor or a motor) for a predetermined time, thereby driving in the load. Let the frequency be 0.
  • the load eg, a compressor or a motor
  • the controller 160 may increase the cooling performance of the cooling device 190 to perform temperature protection control. For example, when the cooling device 190 is a cooling device of a refrigerant cooling method, the controller 160 may increase the refrigerant flow rate of the cooling device 190 to increase the cooling performance of the cooling device 190 . Also, when the cooling device 190 is an air cooling type cooling device, the controller 160 may increase the air volume of the cooling device 190 to increase the cooling performance of the cooling device 190 .
  • the control unit 160 may perform the temperature protection control a plurality of times according to an embodiment, and even though the temperature protection control is performed more than a preset number of times, the control unit 160 determines the temperature error state in the switching elements 135 and 155 . In this case, the power supply operation may be stopped. For example, as shown in FIG. 7 , the control unit 160 controls the temperature protection control ( Example: interrupting the supply current to a load (eg, a compressor) for a certain period of time), and stopping the power supply operation when the temperature protection control is repeated more than a preset number of times.
  • a load eg, a compressor
  • control unit 160 the rate of increase of the temperature difference between any one of the plurality of switching elements 135 and 155 and the other one of the plurality of switching elements 135 and 155 When is above a preset speed, it is determined as a temperature error state, and temperature protection control may be performed.
  • the controller 160 determines a temperature error state to perform temperature protection control.
  • the temperature protection control is performed based on the temperature difference between the plurality of switching elements 135 and 155 .
  • the electronic device 1 including the power supply device 10 will be described in detail.
  • FIG. 8 is a control block diagram of an electronic device according to an exemplary embodiment.
  • the electronic device 1 includes a power supply device 10 that receives an AC voltage from an external power source and supplies power to a load 20 , and a load that receives power and drives it. 20 and a control device 30 for controlling the power supply device 10 and the load 20 .
  • the electronic device 1 may correspond to a home appliance that can be operated by receiving power, and may be, for example, an air conditioner, a washing machine, a dryer, or a cooking appliance.
  • the power supply device 10 may correspond to the power supply device 10 described according to the embodiments of FIGS. 1 to 7 .
  • the power supply device 10 determines whether a temperature error state is based on the temperature change amount of each of the plurality of switching elements 135 and 155 or the temperature difference between the plurality of switching elements 135 and 155, and the temperature error state Temperature protection control can be performed at the time of decision.
  • the load 20 may be driven based on an output voltage supplied from the power supply device 10 .
  • the load 20 may correspond to a compressor (not shown) or a motor (not shown), and may compress the refrigerant by changing the operating frequency according to the control of the control device 30 .
  • the load 20 is a device that provides an output required by the user based on the output voltage supplied from the power supply device 10 , and is not limited to the above example, and there is no limitation on the type.
  • the load 20 may appear as a resistance that varies according to an operation, and the control device 30 sets a preset voltage that the DC voltage follows according to the resistance value indicated by the load 20 .
  • the switching period of the converter 130 may be controlled to adjust the size of , or to improve the power factor.
  • the control device 30 is configured to perform the above-described operation using a memory storing data for an algorithm or a program reproducing the algorithm for controlling the operation of the components in the electronic device 1, and the data stored in the memory. It may be implemented by a processor. Also, the control device 30 may be implemented as a single chip with the control unit 160 of the power supply device 10 .
  • the power supply device 10 may be used as a method of controlling the power supply device 10 . Accordingly, the contents described above with reference to FIGS. 1 to 8 may be equally applied to the control method of the power supply device 10 .
  • FIG. 9 is a flowchart of a case in which temperature protection control is performed based on the amount of change in temperature of the switching elements 135 and 155 in the method of controlling the power supply device 10 according to an exemplary embodiment.
  • the power supply device 10 detects the temperature of each of the plurality of switching elements 135 and 155 when the amount of change of the input current is less than a preset value (YES in 910). may (920).
  • the power supply device 10 may initiate an operation of determining whether a temperature error state exists in the switching elements 135 and 155 in a situation where the change in input current is not large.
  • the temperature of the switching elements 135 and 155 only when the input current is constant, considering that the temperature in the switching elements 135 and 155 also varies when the input current is changed. It is possible to determine the temperature error state based on the amount of change.
  • the power supply device 10 when the preset time elapses in a state in which the amount of change in temperature of any one of the plurality of switching elements 135 and 155 is equal to or greater than a preset value (Yes in 930) ( Example of 940) It is determined as a temperature error in the switching element (950), and temperature protection control for the switching element can be performed (960).
  • control unit 160 the amount of temperature change in any one of the plurality of switching elements 135 and 155 included in each of the converter 130 and the inverter 150 is greater than or equal to a preset value for a preset time. If maintained for a while, it can be determined as a temperature error in the corresponding switching element, and temperature protection control for cooling of the corresponding switching element can be performed.
  • FIG. 10 is a flowchart illustrating a case in which temperature protection control is performed based on a temperature difference between switching elements 135 and 155 in a method of controlling the power supply device 10 according to an exemplary embodiment.
  • the power supply device 10 detects the temperature of each of the plurality of switching elements 135 and 155 when the amount of change of the input current is less than a preset value (Yes of 1010). may (1020).
  • the power supply device 10 may initiate an operation of determining whether a temperature error state exists in the switching elements 135 and 155 in a situation where the change in input current is not large. In other words, in consideration of the fact that the temperature in the switching elements 135 and 155 is also changed when the input current is changed, the power supply device 10 may change the temperature between the switching elements 135 and 155 only when the input current is constant. It is possible to determine a temperature error condition based on the temperature difference.
  • the power supply device 10 is a state in which the temperature difference between the plurality of switching elements 135 and 155 exceeds a preset temperature difference (Yes in 1030) and when a preset time elapses (Yes in 1040) It is determined as a temperature error in the switching element ( 1050 ), and temperature protection control for the switching element may be performed ( 1060 ).
  • the control unit 160 the temperature difference between any one of the plurality of switching elements (135, 155) and the other one of the plurality of switching elements (135, 155) is a preset temperature difference If the time is exceeded, it is determined as a temperature error state, and temperature protection control can be performed.
  • the controller 160 may adjust a preset temperature difference to be compared with the temperature difference between the switching elements in an increasing direction in proportion to the magnitude of the input current or the input AC voltage.
  • the disclosed embodiments may be implemented in the form of a recording medium storing instructions executable by a computer. Instructions may be stored in the form of program code, and when executed by a processor, may generate program modules to perform operations of the disclosed embodiments.
  • the recording medium may be implemented as a computer-readable recording medium.
  • the computer-readable recording medium includes any type of recording medium in which instructions readable by the computer are stored. For example, there may be read only memory (ROM), random access memory (RAM), magnetic tape, magnetic disk, flash memory, optical data storage, and the like.
  • ROM read only memory
  • RAM random access memory
  • magnetic tape magnetic tape
  • magnetic disk magnetic disk
  • flash memory optical data storage, and the like.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Une alimentation électrique selon un mode de réalisation comprend : un redresseur pour redresser une tension alternative d'entrée ; un convertisseur qui comprend au moins un premier élément de commutation et convertit la tension alternative d'entrée redressée en une tension continue qui suit une tension prédéfinie ; un onduleur qui comprend une pluralité de seconds éléments de commutation et convertit la tension continue en une tension triphasée ; une pluralité de capteurs de température pour détecter la température de chacun d'une pluralité d'éléments de commutation comprenant le ou les premiers éléments de commutation et la pluralité de seconds éléments de commutation ; et un processeur qui détermine s'il existe une erreur de température dans la pluralité d'éléments de commutation sur la base de différences de température entre la pluralité d'éléments de commutation ou la quantité de changement de température dans chacun de la pluralité d'éléments de commutation, et réalise une commande de protection de la température pour la pluralité d'éléments de commutation lorsque l'erreur de température est déterminée comme étant présente.
PCT/KR2021/019183 2021-02-18 2021-12-16 Alimentation électrique, dispositif électronique et son procédé de commande WO2022177117A1 (fr)

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Applications Claiming Priority (2)

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KR1020210022075A KR20220118207A (ko) 2021-02-18 2021-02-18 전원 공급 장치, 전자 장치, 및 그 제어 방법
KR10-2021-0022075 2021-02-18

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012139056A (ja) * 2010-12-27 2012-07-19 Denso Corp インバータ制御装置，インバータ制御方法および車両
JP2013023305A (ja) * 2011-07-15 2013-02-04 Toshiba Elevator Co Ltd エレベータ制御装置
JP2017038427A (ja) * 2015-08-07 2017-02-16 三菱電機株式会社 電力変換装置、及び誘導加熱調理器
JP2017184368A (ja) * 2016-03-29 2017-10-05 アイシン精機株式会社 インバータ装置
KR20200046849A (ko) * 2018-10-26 2020-05-07 엘지전자 주식회사 공기조화기 및 그 동작방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012139056A (ja) * 2010-12-27 2012-07-19 Denso Corp インバータ制御装置，インバータ制御方法および車両
JP2013023305A (ja) * 2011-07-15 2013-02-04 Toshiba Elevator Co Ltd エレベータ制御装置
JP2017038427A (ja) * 2015-08-07 2017-02-16 三菱電機株式会社 電力変換装置、及び誘導加熱調理器
JP2017184368A (ja) * 2016-03-29 2017-10-05 アイシン精機株式会社 インバータ装置
KR20200046849A (ko) * 2018-10-26 2020-05-07 엘지전자 주식회사 공기조화기 및 그 동작방법

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